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Rev.1.0
INTERRUPT CONTROLLER (ICU)
5.6 Description of System Break Interrupt (SBI) Operation
5.6 Description of System Break Interrupt (SBI) Operation
5.6.1 Accepting SBI Interrupt
The System Break Interrupt (SBI) is an emergency interrupt issued when power outage is detected
or a fault condition is notified from an external watchdog timer. The SBI interrupt is always accepted
___
by a falling edge of the SBI signal regardless of how the PSW Register IE bit is set, and cannot be
masked.
5.6.2 SBI Processing by Handler
After processing for the SBI is finished, always be sure to terminate or reset the system without
returning to the program the CPU was executing when the interrupt occurred.
Figure 5.6.1 Example of Operation for SBI Interrupt
H'0000 0010
BRA instruction
SBI (System Break
Interrupt) handler
SBI (System Break Interrupt)
vector entry
Program being
executed
SBI generated
System terminate
processing
Note: Do not return to the program the CPU was executing
when the interrupt occurred.
Terminate or reset
the system
Summary of Contents for 32172
Page 20: ... This is a blank page 16 ...
Page 21: ...1 1 Overview 1 2 Block Diagram 1 3 Pin Functions 1 4 Pin Layout CHAPTER 1 CHAPTER 1 OVERVIEW ...
Page 44: ...1 1 24 Rev 1 0 This is a blank page Overview 1 4 Pin Layout ...
Page 58: ...2 2 14 Rev 1 0 This is a blank page CPU 2 6 Data Formats ...
Page 122: ...4 4 26 Rev 1 0 This is a blank page EIT 4 13 Precautions on EIT ...
Page 200: ...7 7 6 Rev 1 0 This is a blank page RESET 7 4 Precautions to Be Taken Immediately after Reset ...
Page 298: ...9 9 58 Rev 1 0 This is a blank page DMAC 9 4 Precautions on Using DMAC ...
Page 776: ...19 19 10 Rev 1 0 RAM BACKUP MODE 19 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Page 782: ...20 20 6 Rev 1 0 OSCILLATION CIRCUIT 20 2 Clock Generator Circuit This is a blank page ...
Page 856: ...23 23 26 Rev 1 0 This is a blank page ELECTRICAL CHARACTERISTICS 23 6 AC Characteristics ...
Page 857: ...24 1 A D Conversion Characteristics CHAPTER 24 CHAPTER 24 STANDARD CHARACTERISTICS ...
Page 859: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Page 865: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...